/**
 * Copyright 2000 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 */
package self.amigo.io;

import java.io.*;
import java.util.*;

import org.w3c.dom.*;

import self.gee.*;
import self.xml.*;

public class DiagramWriter extends FilterWriter {
  final static public String ELEMENT_NAME = "AMS";
  final static public String ELEMENT_TYPE = "type";
  final static public String SOURCE = "self.amigo.Diagram";
  public final static String SIGNATURE = "<" + ELEMENT_NAME + " " + ELEMENT_TYPE +
                                         "=\"" + SOURCE + "\">";
  public DiagramWriter( Writer o ) {
    super( o );
  }
  
  public void writeDiagram( IDiagram diag ) throws IOException {
    Document doc = DomUtils.getDocumentBuilder().newDocument();
    Element amsElem = doc.createElement( ELEMENT_NAME );
    DomUtils.setElementAttribute( amsElem , ELEMENT_TYPE, SOURCE );      
    doc.appendChild( amsElem );

    Element diagElem = doc.createElement( diag.getClass().getName() );
    amsElem.appendChild( diagElem );
    
    HashMap objIdLookup = new HashMap();
    diag.writeTo( doc, diagElem, objIdLookup );
    writeDom( doc );
  }
  
  private void writeDom( Node doc ) throws IOException {
    PrintWriter wrtr = new PrintWriter( out );
    XmlWriter.writeXml( doc, wrtr );
  }
}